Dynamic End Property

class Example extends Phaser.Scene
{
    constructor()
    {
        super();
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('ball', 'assets/sprites/shinyball.png');
        this.load.image('cursor', 'assets/sprites/drawcursor.png');
    }

    create ()
    {
        var from = this.add.image(400, 300, 'ball').setAlpha(0.6);
        var marker = this.add.image(400, 300, 'cursor').setAlpha(0.6);
        var image = this.add.image(400, 300, 'ball');

        this.input.on('pointerdown', function (pointer)
        {

            marker.setPosition(pointer.x, pointer.y);

        });

        var tween = this.tweens.add({
            targets: image,
            props: {
                x: { value: function () { return marker.x; }, ease: 'Power1' },
                y: { value: function () { return marker.y; }, ease: 'Power3' }
            },
            duration: 500,
            yoyo: true,
            repeat: -1
        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#2d2d2d',
    parent: 'game-container',
    scene: Example
};

const game = new Phaser.Game(config);